How to Setup Raspberry Pi Without Monitor and Keyboard
This step, we'll use Putty to communicates with Raspberry Pi through SSH. Then use it to enable VNC Server on Raspberry Pi.
1. Open Putty
2. Under Host Name, Type raspberrypi.local
3. Under Port, Type 22
Let's login to our Raspberry Pi in a Terminal Window which just pop up
login as: pi
pi@raspberrypi.local's password: raspberry
pi@raspberrypi:~ $ sudo raspi-config
Now we'll get into configuration (use arrow key to move and Enter to choose)
1. Choose 5 Interfacing Options
2. Choose P3 VNC then Choose Yes to enable (Would you like the VNC Server to be enable?)
VNC has been enabled so let's to the last step
https://www.instructables.com/id/How-to-Setup-Raspberry-Pi-Without-Monitor-and-Keyb/